Symptoms of Chronic Fatigue Syndrome (CFS)

Symptoms of chronic fatigue syndrome (CFS) may occur suddenly after you have a
cold
,
bronchitis
, hepatitis, or an intestinal infection. Symptoms may follow a bout of infectious
mononucleosis
(mono), which is caused by a virus that temporarily saps your energy. CFS can also begin after a period of high stress. Sometimes it develops more gradually, with no clear illness or other event noted as a starting point.

Unlike flu symptoms that usually go away in a few days or weeks, symptoms of CFS persist or recur in cycles for at least six months in 50% of time. CFS symptoms vary from person to person. Since 1994, the guidelines for diagnosing CFS include, in addition to a six-month history of fatigue that is not relieved with bed rest, at least four of the following eight symptoms:

Muscle aches

Joint pain without swelling or redness

Headaches

Trouble with short-tern memory or concentration, forgetfulness, or confusion

Sore throat

Tender lymph nodes

Trouble sleeping or not feeling rested after sleep

Worsening symptoms 24 hours or more after exercise

In addition to the eight diagnostic symptoms, patients with CFS can also suffer from:

Revision Information

This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.